【LOJbeta round1】ZQC的手办

NOI2012-超级钢琴的升级版。

用线段树维护最小值及其出现位置，接下来就跟超级钢琴一个做法了。

#include<bits/stdc++.h>
#define N 500010
#define inf 1000000007
#define fi first
#define sc second
#define lson (o<<1)
#define rson (o<<1|1)
using namespace std;
typedef long long ll;
typedef pair<int,int> pir;
inline int read(){
    int f=1,x=0;char ch;
    do{ch=getchar();if(ch=='-')f=-1;}while(ch<'0'||ch>'9');
    do{x=x*10+ch-'0';ch=getchar();}while(ch>='0'&&ch<='9');
    return f*x;
}
int n,a[N],l,r,k,v;
pir tmp;
struct Segment_Tree{
    pir minv[N<<2];int tagv[N<<2];
    inline void puttag(int o,int v){
        tagv[o]=max(tagv[o],v);
        minv[o].fi=max(minv[o].fi,v);
    }
    inline void pushdown(int o){
        if(tagv[o]==0)return;
        puttag(lson,tagv[o]);puttag(rson,tagv[o]);
        tagv[o]=0;
    }
    inline void pushup(int o){minv[o]=min(minv[lson],minv[rson]);}
    void change(int o,int l,int r,int ql,int qr,int v){
        if(ql<=l&&r<=qr){puttag(o,v);return;}
        pushdown(o);int mid=(l+r)>>1;
        if(ql<=mid)change(lson,l,mid,ql,qr,v);
        if(qr>mid)change(rson,mid+1,r,ql,qr,v);
        pushup(o);
    }
    pir query(int o,int l,int r,int ql,int qr){
        if(ql<=l&&r<=qr)return minv[o];
        pushdown(o);int mid=(l+r)>>1;
        pir ans=make_pair(inf,0);
        if(ql<=mid)ans=min(ans,query(lson,l,mid,ql,qr));
        if(qr>mid)ans=min(ans,query(rson,mid+1,r,ql,qr));
        return ans;
    }
    void build(int o,int l,int r){
        if(l==r){minv[o]=make_pair(a[l],l);return;}
        int mid=(l+r)>>1;
        build(lson,l,mid);build(rson,mid+1,r);
        pushup(o);
    }
}T;
struct seg{int l,r;pir mv;};
bool operator <(seg a,seg b){return a.mv.fi>b.mv.fi;}
priority_queue<seg> Q;
int ans[N],top,q;
inline void push(int l,int r){
    if(l>r)return;pir tmp=T.query(1,1,n,l,r);
    if(tmp.fi>=k)return;
    Q.push((seg){l,r,tmp});
}
int main(){
    n=read();
    for(int i=1;i<=n;i++)a[i]=read();
    T.build(1,1,n);
    q=read();
    while(q--){
        int opt=read();
        if(opt==1){
            int l=read(),r=read(),v=read();
            T.change(1,1,n,l,r,v);
        }
        else{
            top=0;while(!Q.empty())Q.pop();
            l=read(),r=read(),k=read(),v=read();
            push(l,r);
            while(!Q.empty()){
                seg tmp=Q.top();Q.pop();
                ans[++top]=tmp.mv.fi;
                push(tmp.l,tmp.mv.sc-1);push(tmp.mv.sc+1,tmp.r);
                if(--v==0)break;
            }
            if(v==0){
                sort(ans+1,ans+top+1);
                for(int i=1;i<=top;i++)printf("%d ",ans[i]);puts("");
            }
            else puts("-1");
        }
    }
}